green tide (macro-algal bloom)kakohigashi-hs/pdf/h30/kadai/...18 -0.20 0.00 0.20 0.40 0.60 0.80 1.00...
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green tide (Macro-algal bloom)
keyword
10cm
Sea lettuce!!
https://renote.jp/articles/5853/page/2
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3 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
4
https://www.irasutoya.com/2014/06/blog-post_941.html
https://www.scmp.com/news/china/article/1284156/cause-qingdaos-green-tide-algae-mystery
at Takasago Seaside Park
Normal scenery Green Tide!!!
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6 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
7
Causes of green tide
Reproduce in the bay
Float out beyond the bay
Significance
8
Reproduce in the bay
Nutrition of seawater
N
P
How about other elements??
Significance
9 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
10 Pre-expt.
Artificial seawater
Deionized water
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0.60
gro
wth
fro
m d
ay 0
Pre-expt.
Artificial seawater
Deionized water
[cm2]
11 Pre-expt.
Deionized water
↓ didn’t grow
Artificial sea water ↓
grew well
12 Pre-expt.
Growth of sea lettuce?
Artificial seawater
13 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
14 Expt.1
NaCl (aq) NaCl (aq)
N Fe
Mg
S
Ca
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0.00
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0.80
1.00
gro
uth
fro
m t
he
firs
t d
ay
Expt.1
NaCl (aq)
NaCl (aq) + all the elements
[cm2]
15 Result
NaCl (aq) +
all the elements ↓
grew well
NaCl (aq) ↓
didn’t grow
16 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
17 Expt.2
⑤ -NH4Cl
① -MgCl2
⑥ -FeCl3
③ -KCl ② -CaCl2
④ -Na2SO4
S
Ca
Fe
K
N
N N
N N
Fe
Fe Fe Fe
K K
K
Mg Mg Mg
Mg Mg
S
S S
Ca
Ca
Ca
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-0.20
0.00
0.20
0.40
0.60
0.80
1.00d
ay0
day
1
day
2
day
3
day
4
day
5
day
6
day
7
day
8
day
9
day
10
gro
wth
fro
m d
ay 0
Expt.2
-MgCl2
[cm2]
-NH4Cl,-FeCl3 ↓
grew well
→ not important
&
Result
-0.20
0.00
0.20
0.40
0.60
0.80
1.00d
ay0
day
1
day
2
day
3
day
4
day
5
day
6
day
7
day
8
day
9
day
10
gro
wth
fro
m d
ay 0
Expt.2
-MgCl2
[cm2]
19 Result
-MgCl2,-CaCl2, -KCl,-Na2SO4
↓
didn’t grow
→ important!
20 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
21 Conclusion
→ important!
We should focus on…
22 Contents
1. Motive & Purpose
3. Pre-expt.1
4. Expt.1 5. Expt.2
7. Future prospects
6. Conclusion
2. Significance
23 Future prospects
Solve green tide!!
What elements?
What concentration?
Apply in the sea
↑
↑
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Acknowledgements
We deeply appreciate
Mr.Hanyuda
giving us invaluable advice.
25 References
• Ishii Yuichi. National Research and Development Institute of the National Institute for Environmental Studies: Seaweed environmental problems bring about - the generation of green tide and the constituent species of features. (海藻がもたらす環境問題–グリーンタイドの発生と構成種の特徴–)National Institute for Environmental Studies News. 2010, Vol.29, No.23, p465-470.
• Yauchi Eiji, Ishii Kenichi, Imoto Tatuya, Gomyo Michio: Feald study on proliferation of ulva sp. in Yatsu higata. (谷津干潟におけるアオサの繁茂特性に関する現地調査)Proceedings of civil engineering in the ocean. 2007, No.23, p465-470.
• Yabe Tohru: Are the extreme dominance phenomena caused by sea lettuce really reducing the ecosystem function of tidal flats? (アオサ類による極端な優占現象は干潟の生態系機能を本当に低下させているのか?)National Institute for Environmental Studies News. 2004, Vol.33, No.4.
• Nishikawa Tomoki, Takeda Shota, Yamochi Susumu: Prevention of Outbreaks of Green Tide occurring on the Artificial Tidal Flat and Salt Marsh. (人工干潟や塩性湿地で大発生するグリーンタイドの抑制に関する検討)Proceedings of the Japan Society of Civil Engineers B2 (Coastal Engineering). 2009, Vol.B2-65, No.1, p1221-1225.
• Nabata Shinichi: Classification and use of sea lettuce.(海藻アオサ類の分類と利用)Hokusuishi dayori. 2005,No.69,p1-12.
• Matsuoka Satoru, Yoshimatsu Sadaaki, Ono Akira, Ichimi Kazuhiko, Fujiwara Munehiro, Honda Kenji, Tada Kuninao: Discoloration of Nori (Porphyra) and Characteristics of Water Quality in Eastern Bisan Seto. (備讃瀬戸東部(香川県沿岸)におけるノリ色落ちと水質環境)Bulletin on coastal oceanography. 2005, Vol.43, No.1, p77-84.
• Yoshida Goro, Niimura Yoshiko, Tarutani Kenji, Hamaguchi Masami: Research review on the relationship between macroalgal-production and nutrients, and relative assessment of the nutrient conditions on macroalgae in the Seto Inland Sea. (海藻類の一次生産と栄養塩の関係に関する研究レビュー-および瀬戸内海藻場の栄養塩環境の相対評価-)Bulletin of Fisheries Research Agency. 2011, No.34, p1-31.
Thank you for listening!
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